Question

A cube of ice is taken from the freezer at -8.5 ∘C and placed in a 85-g aluminum calorimeter filled with 320 g of water at room temperature of 20.0 ∘C. The final situation is observed to be all water at 15.0 ∘C. The specific heat of ice is 2100 J/kg⋅C∘, the specific heat of aluminum is 900 J/kg⋅C∘, the specific heat of water is is 4186 J/kg⋅C∘, the heat of fusion of water is 333 kJ/Kg. What was the mass of the ice cube?

A major source of heat loss from a house in cold weather is through the windows. Calculate the rate of heat flow by conduction through a glass window 2.0 m × 1.5 m in area and ℓ = 2.8 mm thick (Figure 1), if the temperature at the inner and outer surface is 15.0∘C. Assume that there are strong gusty winds and the external temperature is 0.0 ∘C .

Answer 1